Portable filtration unit



FIG. 1 is a front elevational view of a portable filtration unit showing my new design.

FIG. 2 is a side elevational view of the right side thereof as viewed in FIG. 1.

FIG. 3 is a rear elevational view thereof.

FIG. 4 is a left side elevational view thereof as viewed in FIG. 1.

FIG. 5 is a bottom plan view thereof.

FIG. 6 is a top plan view thereof.

The showing of the tubular elements broken away is to indicate indeterminate length. 

The ornamental design for a portable filtration unit, as shown and described. 